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US3391509A
Expired / Lapsed
US
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Drywall edge construction and finishing channel
Assignee: Individual
•
Filing: 1966-11-03
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Granted: 1968-07-09
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Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 Albert A Fruman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:48
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/02; E04F13/04; E04F13/06; E04F2013/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |